Robot vacuum cleaner



FIG. 1 is a top perspective view of a robot vacuum cleaner showing ournew design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged view of the portion indicated by line 8 in FIG. 1.

The broken lines in the drawings depict portions of the robot vacuumcleaner that form no part of the claimed design.

CLAIM The ornamental design for a robot vacuum cleaner, as shown anddescribed.